Adding guidelines for writing platform agnostic code

[swapnilashtekar]

Description:
Adding guidelines for writing platform agnostic code in Contributions.md

Link to tracking Issue: 17195
#17195

Testing:

Documentation:
Added guidelines for writing platform agnostic code in contributions.md

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: swapnilashtekar / name: Swapnil Ashtekar (7788807)

[runforesight]

Foresight Summary

    
Major Impacts

build-and-test duration(44 minutes 52 seconds) has decreased 20 minutes 37 seconds compared to main branch avg(1 hour 5 minutes 29 seconds).

View More Details

⭕  build-and-test-windows workflow has finished in 5 seconds (40 minutes 45 seconds less than main branch avg.) and finished at 14th Feb, 2023.

---

Job	Failed Steps	Tests
windows-unittest-matrix	-     🔗	N/A	See Details
windows-unittest	-     🔗	N/A	See Details

---

⭕  changelog workflow has finished in 10 seconds (3 minutes 33 seconds less than main branch avg.) and finished at 14th Feb, 2023.

---

Job	Failed Steps	Tests
changelog	-     🔗	N/A	See Details

---

✅  telemetrygen workflow has finished in 56 seconds (2 minutes 10 seconds less than main branch avg.) and finished at 14th Feb, 2023.

---

Job	Failed Steps	Tests
publish-latest	-     🔗	N/A	See Details
build-dev	-     🔗	N/A	See Details
publish-stable	-     🔗	N/A	See Details

---

✅  check-links workflow has finished in 1 minute 41 seconds (55 seconds less than main branch avg.) and finished at 14th Feb, 2023.

---

Job	Failed Steps	Tests
changed files	-     🔗	N/A	See Details
check-links	-     🔗	N/A	See Details

---

✅  build-and-test workflow has finished in 44 minutes 52 seconds (20 minutes 37 seconds less than main branch avg.) and finished at 14th Feb, 2023.

---

Job	Failed Steps	Tests
unittest-matrix (1.18, internal)	-     🔗	✅ 561  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.19, internal)	-     🔗	✅ 561  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.18, extension)	-     🔗	✅ 537  ❌ 0  ⏭ 0    🔗	See Details
correctness-metrics	-     🔗	✅ 2  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.19, processor)	-     🔗	✅ 1509  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.18, processor)	-     🔗	✅ 1509  ❌ 0  ⏭ 0    🔗	See Details
correctness-traces	-     🔗	✅ 17  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.19, extension)	-     🔗	✅ 537  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.19, receiver-0)	-     🔗	✅ 2574  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.18, receiver-0)	-     🔗	✅ 2574  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.18, exporter)	-     🔗	✅ 2455  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.19, exporter)	-     🔗	✅ 2455  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.19, receiver-1)	-     🔗	✅ 1959  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.18, other)	-     🔗	✅ 4684  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.18, receiver-1)	-     🔗	✅ 1959  ❌ 0  ⏭ 0    🔗	See Details
unittest-matrix (1.19, other)	-     🔗	✅ 4684  ❌ 0  ⏭ 0    🔗	See Details
integration-tests	-     🔗	✅ 55  ❌ 0  ⏭ 0    🔗	See Details
setup-environment	-     🔗	N/A	See Details
checks	-     🔗	N/A	See Details
lint-matrix (receiver-0)	-     🔗	N/A	See Details
lint-matrix (receiver-1)	-     🔗	N/A	See Details
lint-matrix (processor)	-     🔗	N/A	See Details
lint-matrix (exporter)	-     🔗	N/A	See Details
lint-matrix (extension)	-     🔗	N/A	See Details
lint-matrix (internal)	-     🔗	N/A	See Details
lint-matrix (other)	-     🔗	N/A	See Details
build-examples	-     🔗	N/A	See Details
check-codeowners	-     🔗	N/A	See Details
check-collector-module-version	-     🔗	N/A	See Details
lint	-     🔗	N/A	See Details
unittest (1.19)	-     🔗	N/A	See Details
unittest (1.18)	-     🔗	N/A	See Details
cross-compile (darwin, amd64)	-     🔗	N/A	See Details
cross-compile (darwin, arm64)	-     🔗	N/A	See Details
cross-compile (linux, 386)	-     🔗	N/A	See Details
cross-compile (linux, amd64)	-     🔗	N/A	See Details
cross-compile (linux, arm)	-     🔗	N/A	See Details
cross-compile (linux, arm64)	-     🔗	N/A	See Details
cross-compile (linux, ppc64le)	-     🔗	N/A	See Details
cross-compile (windows, 386)	-     🔗	N/A	See Details
cross-compile (windows, amd64)	-     🔗	N/A	See Details
build-package (deb)	-     🔗	N/A	See Details
build-package (rpm)	-     🔗	N/A	See Details
windows-msi	-     🔗	N/A	See Details
publish-check	-     🔗	N/A	See Details
publish-stable	-     🔗	N/A	See Details
publish-dev	-     🔗	N/A	See Details

---

✅  prometheus-compliance-tests workflow has finished in 3 minutes 28 seconds (5 minutes 19 seconds less than main branch avg.) and finished at 14th Feb, 2023.

---

Job	Failed Steps	Tests
prometheus-compliance-tests	-     🔗	✅ 21  ❌ 0  ⏭ 0    🔗	See Details

---

✅  load-tests workflow has finished in 9 minutes 58 seconds (6 minutes 55 seconds less than main branch avg.) and finished at 14th Feb, 2023.

---

Job	Failed Steps	Tests
loadtest (TestTraceAttributesProcessor)	-     🔗	✅ 3  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestIdleMode)	-     🔗	✅ 1  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestMetric10kDPS|TestMetricsFromFile)	-     🔗	✅ 6  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestTraceNoBackend10kSPS|TestTrace1kSPSWithAttrs)	-     🔗	✅ 8  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestMetricResourceProcessor|TestTrace10kSPS)	-     🔗	✅ 12  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestTraceBallast1kSPSWithAttrs|TestTraceBallast1kSPSAddAttrs)	-     🔗	✅ 10  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestBallastMemory|TestLog10kDPS)	-     🔗	✅ 18  ❌ 0  ⏭ 0    🔗	See Details
setup-environment	-     🔗	N/A	See Details

---

✅  e2e-tests workflow has finished in 11 minutes 12 seconds (5 minutes 44 seconds less than main branch avg.) and finished at 14th Feb, 2023.

---

Job	Failed Steps	Tests
kubernetes-test	-     🔗	N/A	See Details

---

🔎 See details on Foresight

^{*You can configure Foresight comments in your organization settings page.}

[swapnilashtekar]

@TylerHelmuth Can you please review the pull request when you get chance? Thanks.