chore: add test_segment_config_backwards

[joshieDo]

If the order of the variants is changed, it will result in a different deserialization result.

Adds the test to ensure we don't change it without any failures.

reth/crates/static-file/types/src/segment.rs

Lines 26 to 37 in 138004b

	pub enum StaticFileSegment {
	#[strum(serialize = "headers")]
	/// Static File segment responsible for the `CanonicalHeaders`, `Headers`,
	/// `HeaderTerminalDifficulties` tables.
	Headers,
	#[strum(serialize = "transactions")]
	/// Static File segment responsible for the `Transactions` table.
	Transactions,
	#[strum(serialize = "receipts")]
	/// Static File segment responsible for the `Receipts` table.
	Receipts,
	}