Rust

Introduce `AnyTls` #498

Job	Run time
Check all the features of the heed project	2m 8s
Check the heed3 project (ubuntu-latest)	41s
Ensure clippy is happy on heed and heed3	50s
Check all the features of the heed3 project	45s
Check the heed3 project (windows-latest)	30s
Run the heed examples (ubuntu-latest)	53s
Check the heed3 project (macos-latest)	26s
Ensure the heed and heed3 project are formatted	28s
Run the heed examples (macos-latest)	39s
Run the heed3 examples (ubuntu-latest)	52s
Run the heed3 examples (macos-latest)	35s
Test the heed3 project (ubuntu-latest)	47s
Test the heed project (ubuntu-latest)	1m 21s
Test the heed3 project (windows-latest)	37s
Ensure heed3 is not erasing heed	4s
Test the heed project (windows-latest)	3m 2s
Test the heed3 project (macos-latest)	30s
Test the heed project (macos-latest)	47s
	15m 55s

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