frame-support: migrate some tests from `decl_*` macros to the new `pallet` macros (#12401)

* frame-support: migrate some tests from decl macros to new pallet attribute macros

* Remove useless type alias

* Remove useless type alias

* Work around for rust issue 52234

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* Fix tests

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* Use polkadot-compatible paste version

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* Fix crate access and add tests

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* Typo

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

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Signed-off-by: Oliver Tale-Yazdi <[email protected]>
Co-authored-by: Oliver Tale-Yazdi <[email protected]>
Co-authored-by: parity-processbot <>