feat: add query groups in x/group (backport #14879) (#15475)

Co-authored-by: atheeshp <59333759+atheeshp@users.noreply.github.com>
Co-authored-by: Julien Robert <julien@rbrt.fr>

CHANGELOG.md

@@ -39,14 +39,15 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Features
 
+* (x/groups) [#14879](https://github.com/cosmos/cosmos-sdk/pull/14879) Add `Query/Groups` query to get all the groups.
 * (x/gov,cli) [#14718](https://github.com/cosmos/cosmos-sdk/pull/14718) Added `AddGovPropFlagsToCmd` and `ReadGovPropFlags` functions.
 * (cli) [#14655](https://github.com/cosmos/cosmos-sdk/pull/14655) Add a new command to list supported algos.
 * (x/genutil,cli) [#15147](https://github.com/cosmos/cosmos-sdk/pull/15147) Add `--initial-height` flag to cli init cmd to provide `genesis.json` with user-defined initial block height.
 
 ### Improvements
 
 * (x/distribution) [#15462](https://github.com/cosmos/cosmos-sdk/pull/15462) Add delegator address to the event for withdrawing delegation rewards.
-* [#14609](https://github.com/cosmos/cosmos-sdk/pull/14609) Add RetryForBlocks method to use in tests that require waiting for a transaction to be included in a block.
+* [#14609](https://github.com/cosmos/cosmos-sdk/pull/14609) Add `RetryForBlocks` method to use in tests that require waiting for a transaction to be included in a block.
 
 ### Deprecated