[clang] [clang][analyzer][doc] Migrate checkers-related docs from HTML to RST (PR #97032)

[Endre Fülöp via cfe-commits]

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@@ -126,7 +126,7 @@ <h3 id="cocoa_mem">Cocoa & Core Foundation Memory Management
 Annotations</h3>
 
 <!--
-<p>As described in <a href="/available_checks.html#retain_release">Available
+<p>As described in <a href="https://clang.llvm.org/docs/analyzer/checkers.html">Available
 Checks</a>,
 -->
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gamesh411 wrote:

I am unsure which one to link to, so I opted for less but not misleading information with this edit.

https://github.com/llvm/llvm-project/pull/97032