Python: Bump azure-core from 1.29.0 to 1.29.2 in /python (#2453)

Bumps [azure-core](https://github.com/Azure/azure-sdk-for-python) from
1.29.0 to 1.29.2.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/Azure/azure-sdk-for-python/releases">azure-core's
releases</a>.</em></p>
<blockquote>
<h2>azure-core_1.29.2</h2>
<h2>1.29.2 (2023-08-14)</h2>
<h3>Bugs Fixed</h3>
<ul>
<li>Added a default implementation for
<code>AsyncTokenCredential.__aexit__()</code> <a
href="https://redirect.github.com/Azure/azure-sdk-for-python/issues/31573">#31573</a></li>
</ul>
<h3>Other Changes</h3>
<ul>
<li>Bumped <code>typing-extensions</code> version to 4.6.0.</li>
</ul>
<h2>azure-core_1.29.1</h2>
<h2>1.29.1 (2023-08-09)</h2>
<h3>Bugs Fixed</h3>
<ul>
<li>Not pass <code>enabled_cae</code> unless it is explicitly
enabled.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/Azure/azure-sdk-for-python/commit/e6e90dedd31fe7d85e6bdd8c7ded80009a012213"><code>e6e90de</code></a>
add default impl for AsyncTokenCred (<a
href="https://redirect.github.com/Azure/azure-sdk-for-python/issues/31585">#31585</a>)</li>
<li><a
href="https://github.com/Azure/azure-sdk-for-python/commit/2026a95b8d0046124fb4db057210d68ab11aad59"><code>2026a95</code></a>
Increment package version after release of azure-core (<a
href="https://redirect.github.com/Azure/azure-sdk-for-python/issues/31562">#31562</a>)</li>
<li><a
href="https://github.com/Azure/azure-sdk-for-python/commit/898f5b0ec700ea27bbca4bf27976660fb6a20785"><code>898f5b0</code></a>
not pass enable_cae (<a
href="https://redirect.github.com/Azure/azure-sdk-for-python/issues/31546">#31546</a>)</li>
<li><a
href="https://github.com/Azure/azure-sdk-for-python/commit/5e85ef5fb104bebfe53dbf0701ee0932d3de6af6"><code>5e85ef5</code></a>
Increment version for core releases (<a
href="https://redirect.github.com/Azure/azure-sdk-for-python/issues/31523">#31523</a>)</li>
<li><a
href="https://github.com/Azure/azure-sdk-for-python/commit/8685103afb5d1dab81614a9c6c840179cafe554c"><code>8685103</code></a>
Azure-Core: Fix all typings that are not pipeline related (<a
href="https://redirect.github.com/Azure/azure-sdk-for-python/issues/31494">#31494</a>)</li>
<li>See full diff in <a
href="https://github.com/Azure/azure-sdk-for-python/compare/azure-core_1.29.0...azure-core_1.29.2">compare
view</a></li>
</ul>
</details>
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