refactor(linter): replace ast "compare by hash" to "compare by content"

[Boshen]

oxc/crates/oxc_linter/src/ast_util.rs

Lines 9 to 13 in 63a830e

	pub fn calculate_hash<T: ContentHash>(t: &T) -> u64 {
	let mut hasher = FxHasher::default();
	t.content_hash(&mut hasher);
	hasher.finish()
	}

Can now be replaced by ContentEq https://docs.rs/oxc_span/0.27.0/oxc_span/cmp/trait.ContentEq.html

[Boshen]

Remaining case:

oxc/crates/oxc_linter/src/rules/eslint/no_duplicate_case.rs

Lines 88 to 98 in 63a830e

	let mut map = FxHashMap::default();
	map.reserve(ss.cases.len());
	for case in &ss.cases {
	if let Some(test) = case.test.as_ref() {
	let hash = calculate_hash(test.get_inner_expression());
	if let Some(prev_span) = map.insert(hash, test.span()) {
	ctx.diagnostic(no_duplicate_case_diagnostic(prev_span, test.span()));
	}
	}
	}