Reduce the number of macros used for SignedExtensions

Signed-off-by: Serban Iorga <[email protected]>

* add another condition to the reject-obsolete-parachain-heads extension

* add tracing to obsolete-tx-extensions

* fix tests

* extension_rejects_header_from_new_relay_block_with_same_hash

* fmt

* fix benchmarks

* BridgeRejectObsoleteMessages

* add obsolete confirmations verification to the BridgeRejectObsoleteMessages

* move tests where they belong