infra: no need to manually install crates in CI

[kevinjqliu]

Which issue does this PR close?

• Closes #.

What changes are included in this PR?

make check-toml and make cargo-machete already ensures the crates are installed.

iceberg-rust/Makefile

Lines 35 to 42 in 7362bbd

	install-taplo-cli:
	cargo install taplo-cli@0.9.3
	fix-toml: install-taplo-cli
	taplo fmt
	check-toml: install-taplo-cli
	taplo check

iceberg-rust/Makefile

Lines 29 to 33 in 7362bbd

	install-cargo-machete:
	cargo install cargo-machete@0.7.0
	cargo-machete: install-cargo-machete
	cargo machete

Resolves CI errror from Check toml format:

Run make check-toml
cargo install taplo-cli@0.9.3
    Updating crates.io index
 Downloading crates ...
  Downloaded taplo-cli v0.9.3
error: binary `taplo` already exists in destination
Add --force to overwrite
make: *** [install-taplo-cli] Error 101
Error: Process completed with exit code 2.

Are these changes tested?

[liurenjie1024]

Thanks @kevinjqliu for this fix!