STM32: introduce new wifi driver for B-U585I-IOT02A

[jeromecoutant]

Summary of changes

B-U585I-IOT02A is now supporting Wifi in the default configuration

@jmg-st
@pan-

Impact of changes

Build with CLI1 and CLI2 are OK

Migration actions required

Documentation

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Pull request type

[x] Patch update (Bug fix / Target update / Docs update / Test update / Refactor)
[] Feature update (New feature / Functionality change / New API)
[] Major update (Breaking change E.g. Return code change / API behaviour change)

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Test results

All netsocket tests are OK

[] No Tests required for this change (E.g docs only update)
[x] Covered by existing mbed-os tests (Greentea or Unittest)
[] Tests / results supplied as part of this PR

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Reviewers

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[ciarmcom]

@jeromecoutant, thank you for your changes.
@ARMmbed/mbed-os-maintainers please review.

[0xc0170]

CI started

[mbed-ci]

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jenkins-ci/mbed-os-ci_build-greentea-ARM	✔️
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jenkins-ci/mbed-os-ci_cmake-example-ARM	✔️
jenkins-ci/mbed-os-ci_build-example-ARM	✔️
jenkins-ci/mbed-os-ci_build-example-GCC_ARM	✔️
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