[chore] Add build-and-test, build-and-test-windows, changelog and tel…

…emetrygen to merge group (open-telemetry#31162)

**Description:** 

Adds CI jobs that have required jobs to merge group. Needed for the
merge queue requested on open-telemetry/community/issues/1936

**Link to tracking Issue:** open-telemetry#30880

.github/workflows/build-and-test-windows.yml

@@ -6,6 +6,7 @@ on:
  - 'releases/**'
  tags:
  - 'v[0-9]+.[0-9]+.[0-9]+*'
+ merge_group:
  pull_request:
  types: [opened, synchronize, reopened, labeled, unlabeled]
  branches:

.github/workflows/build-and-test.yml

@@ -4,6 +4,7 @@ on:
  branches: [ main ]
  tags:
  - 'v[0-9]+.[0-9]+.[0-9]+*'
+ merge_group:
  pull_request:
 env:
  TEST_RESULTS: testbed/tests/results/junit/results.xml

.github/workflows/changelog.yml

@@ -6,6 +6,7 @@
 name: changelog
 
 on:
+ merge_group:
  pull_request:
  types: [opened, synchronize, reopened, labeled, unlabeled]
  branches:

.github/workflows/telemetrygen.yml

@@ -4,6 +4,7 @@ on:
  branches: [ main ]
  tags:
  - 'v[0-9]+.[0-9]+.[0-9]+*'
+ merge_group:
  pull_request:
 env:
  # Make sure to exit early if cache segment download times out after 2 minutes.