feat: replace the cosmos-db usecases in the tests with core/testing (backport #21525)

[mergify]

Description

ref: #21373

It is the second part of removing cosmos-db.

---

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Summary by CodeRabbit

• New Features

  • Enhanced testing framework with the introduction of coretesting.NewMemDB() for improved database handling in tests.
  • Added a new configuration parameter minimum-gas-prices for better transaction fee management.
  • Introduced a new in-memory key-value store with batch processing capabilities, improving error handling and functionality.

• Chores

  • Refactored multiple test files to standardize database initialization and improve test reliability.
  • Updated dependencies in go.mod to include new testing utilities and remove outdated packages.

---

This is an automatic backport of pull request #21525 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of aaf72f2 has failed:

On branch mergify/bp/release/v0.52.x/pr-21525
Your branch is up to date with 'origin/release/v0.52.x'.

You are currently cherry-picking commit aaf72f20c.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   baseapp/abci_test.go
	modified:   baseapp/abci_utils_test.go
	modified:   baseapp/baseapp_test.go
	modified:   baseapp/grpcrouter_test.go
	modified:   baseapp/msg_service_router_test.go
	modified:   baseapp/regression_test.go
	modified:   baseapp/utils_test.go
	modified:   client/v2/go.mod
	modified:   client/v2/go.sum
	modified:   docs/learn/advanced/04-store.md
	modified:   go.sum
	modified:   server/mock/app.go
	modified:   server/mock/store_test.go
	modified:   server/v2/cometbft/go.mod
	modified:   server/v2/cometbft/go.sum
	modified:   simapp/app_test.go
	modified:   simapp/go.sum
	modified:   simapp/simd/cmd/root.go
	modified:   simapp/test_helpers.go
	new file:   store/db/errors.go
	new file:   store/db/prefixdb.go
	new file:   store/db/utils.go
	new file:   store/mock/core_store.go
	modified:   tests/e2e/baseapp/block_gas_test.go
	modified:   tests/e2e/genutil/export_test.go
	modified:   tests/go.mod
	modified:   tests/go.sum
	modified:   tests/integration/gov/genesis_test.go
	modified:   tests/integration/store/rootmulti/rollback_test.go
	modified:   testutil/context.go
	modified:   testutil/integration/router.go
	modified:   testutil/network/network.go
	modified:   testutil/sims/app_helpers.go
	modified:   testutil/sims/simulation_helpers.go
	modified:   testutil/sims/simulation_helpers_test.go
	modified:   testutils/sims/runner.go
	modified:   types/query/collections_pagination_test.go
	modified:   types/query/pagination.go
	modified:   x/accounts/defaults/lockup/go.mod
	modified:   x/accounts/defaults/lockup/go.sum
	modified:   x/accounts/defaults/multisig/go.sum
	modified:   x/accounts/go.sum
	modified:   x/authz/go.sum
	modified:   x/bank/go.sum
	modified:   x/circuit/go.sum
	modified:   x/consensus/go.sum
	modified:   x/distribution/go.sum
	modified:   x/epochs/go.sum
	modified:   x/evidence/go.sum
	modified:   x/feegrant/go.sum
	modified:   x/gov/go.sum
	modified:   x/group/go.sum
	modified:   x/group/keeper/invariants_test.go
	modified:   x/mint/go.sum
	modified:   x/nft/go.sum
	modified:   x/params/go.sum
	modified:   x/params/types/subspace_test.go
	modified:   x/protocolpool/go.sum
	modified:   x/slashing/go.sum
	modified:   x/staking/go.sum
	modified:   x/upgrade/go.mod
	modified:   x/upgrade/go.sum
	modified:   x/upgrade/types/storeloader_test.go

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   core/testing/memdb.go
	both modified:   simapp/go.mod
	both modified:   simapp/sim_bench_test.go
	deleted by us:   store/cache/cache_test.go
	deleted by us:   store/cachekv/benchmark_test.go
	deleted by us:   store/cachekv/store.go
	deleted by us:   store/cachekv/store_bench_test.go
	deleted by us:   store/cachekv/store_test.go
	deleted by us:   store/dbadapter/store_test.go
	deleted by us:   store/gaskv/store_test.go
	deleted by us:   store/go.mod
	deleted by us:   store/go.sum
	deleted by us:   store/iavl/store_test.go
	deleted by us:   store/iavl/tree_test.go
	deleted by us:   store/listenkv/store_test.go
	deleted by us:   store/mem/store.go
	deleted by us:   store/prefix/store_test.go
	deleted by us:   store/pruning/manager_test.go
	deleted by us:   store/rootmulti/proof_test.go
	deleted by us:   store/rootmulti/snapshot_test.go
	deleted by us:   store/rootmulti/store.go
	deleted by us:   store/rootmulti/store_test.go
	deleted by us:   store/snapshots/helpers_test.go
	deleted by us:   store/snapshots/manager_test.go
	deleted by us:   store/snapshots/store.go
	deleted by us:   store/snapshots/store_test.go
	deleted by us:   store/tracekv/store_test.go
	deleted by us:   store/transient/store.go
	deleted by us:   store/types/iterator_test.go
	both modified:   x/group/go.mod
	both modified:   x/nft/go.mod
	both modified:   x/params/go.mod

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[julienrbrt]

Todo: use pseudo versions of store and store/v2 from latest commit of main