chore: remove ci jobs for indexing new versions and publishing latest compatible channels #1721

Job	Run time
cancel-previous-runs	2s
check-scripts	9s
cargo-fmt-check	7s
cargo-clippy	17s
cargo-test-workspace	1m 56s
build fuelup release binaries	0s
lint-toml-files	16s
Try fuelup installation with fuelup-init (ubuntu-latest)	13s
Try fuelup installation with fuelup-init (macos-latest)	36s
Do post-release checks	0s
Re-publish the latest channel	0s
publish-check	0s
	3m 36s

Provide feedback