Rust

Introduce `AnyTls` #493

Job	Run time
Check all the features of the heed project	1m 13s
Test the heed3 project (ubuntu-latest)	42s
Test the heed project (ubuntu-latest)	51s
Test the heed3 project (windows-latest)	2m 51s
Test the heed project (windows-latest)	2m 40s
Check all the features of the heed3 project	37s
Check the heed3 project (ubuntu-latest)	20s
Test the heed3 project (macos-latest)	50s
Test the heed project (macos-latest)	43s
Check the heed3 project (windows-latest)	2m 16s
Ensure clippy is happy on heed and heed3	24s
Check the heed3 project (macos-latest)	31s
Run the heed examples (ubuntu-latest)	41s
Ensure the heed and heed3 project are formatted	11s
Run the heed examples (macos-latest)	35s
Run the heed3 examples (ubuntu-latest)	26s
Ensure heed3 is not erasing heed	2s
Run the heed3 examples (macos-latest)	42s
	16m 35s

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