Feature - Adds `UpgradeableLoaderInstruction::Migrate` #358

Job	Run time
Check crate ownership	49s
Sanity checks	44s
Format	18s
Clippy (macos-latest)	1m 25s
Cargo check	1m 12s
Audit	16s
Clippy (windows-latest)	2m 5s
Check crate dependencies for publishing	16s
Clippy (ubuntu-latest)	1m 24s
Check declarations of `dev-context-only-utils` feature	22s
Cargo hack check	3m 13s
Check semver	0s
Check sorting of crate dependencies	26s
Build wasm packages and run tests	1m 45s
Test miri	59s
Run benches	5m 29s
Run frozen-abi tests	1m 34s
Run coverage tests	2m 16s
Run tests on stable toolchain	1m 48s
	26m 21s

Provide feedback