enable download_ci_llvm test

[onur-ozkan]

This was ignored because it caused merge failures on LLVM update PR. The issue was not checking is_ci_llvm_available in the test which is crucial for enabling CI LLVM:

rust/src/bootstrap/src/core/config/config.rs

Lines 2835 to 2844 in 2aa26d8

	match download_ci_llvm {
	StringOrBool::Bool(b) => {
	if !b && self.download_rustc_commit.is_some() {
	panic!(
	"`llvm.download-ci-llvm` cannot be set to `false` if `rust.download-rustc` is set to `true` or `if-unchanged`."
	);
	}
	// If download-ci-llvm=true we also want to check that CI llvm is available
	b && llvm::is_ci_llvm_available(self, asserts)

[rustbot]

r? @albertlarsan68

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[rustbot]

This PR modifies src/bootstrap/src/core/config.

If appropriate, please update CONFIG_CHANGE_HISTORY in src/bootstrap/src/utils/change_tracker.rs.

[albertlarsan68]

LGTM

[albertlarsan68]

@bors r+ rollup

[bors]

📌 Commit ac20242 has been approved by albertlarsan68

It is now in the queue for this repository.