Rust

Introduce `AnyTls` #502

Job	Run time
Check all the features of the heed3 project	38s
Check all the features of the heed project	1m 1s
Ensure clippy is happy on heed and heed3	37s
Check the heed3 project (ubuntu-latest)	27s
Check the heed3 project (windows-latest)	2m 21s
Run the heed examples (ubuntu-latest)	28s
Ensure the heed and heed3 project are formatted	16s
Check the heed3 project (macos-latest)	34s
Run the heed examples (macos-latest)	32s
Run the heed3 examples (ubuntu-latest)	24s
Run the heed3 examples (macos-latest)	33s
Test the heed3 project (ubuntu-latest)	42s
Test the heed project (ubuntu-latest)	40s
Ensure heed3 is not erasing heed	2s
Test the heed3 project (windows-latest)	3m 9s
Test the heed project (windows-latest)	2m 0s
Test the heed3 project (macos-latest)	55s
Test the heed project (macos-latest)	52s
	16m 11s

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