Add http2_request example in sh2lib component

[mahavirj]

This example depends on sh2lib abstraction layer for HTTP/2 protocol with TLS. Hence, its kept inside the sh2lib component itself.

Note: ESP-IDF version prior to 5.2 had this example as a part of it but it will be removed starting 5.2 release.

Checklist

NA - Adding example inside an existing component

Change description

Please describe your change here

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Unit Test Results

  11 files  ±0    11 suites  ±0   15m 12s :stopwatch: -4s   26 tests ±0    26 :heavy_check_mark: ±0  0 :zzz: ±0  0 :x: ±0  243 runs  ±0  243 :heavy_check_mark: ±0  0 :zzz: ±0  0 :x: ±0 

Results for commit a22439e0. ± Comparison against base commit 1ad789e7.

:recycle: This comment has been updated with latest results.