ci/test-ledger-app: undo previous changes and run on ubuntu image (backport #4160)

[mergify]

Describe your changes

Checklist before merging

• If this PR has some consensus breaking changes, I added the corresponding breaking:: labels
  • This will require 2 reviewers to approve the changes
• If this PR requires changes to the docs or specs, a corresponding PR is opened in the namada-docs repo
  • Relevant PR if applies:
• If this PR affects services such as namada-indexer or namada-masp-indexer, a corresponding PR is opened in that repo
  • Relevant PR if applies:

---

This is an automatic backport of pull request #4160 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of b2e33f9 has failed:

On branch mergify/bp/maint-libs-0.46/pr-4160
Your branch is up to date with 'origin/maint-libs-0.46'.

You are currently cherry-picking commit b2e33f943.
  (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)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   .github/workflows/ci.yml

no changes added to commit (use "git add" and/or "git commit -a")

Cherry-pick of 52d0ebb has failed:

On branch mergify/bp/maint-libs-0.46/pr-4160
Your branch is ahead of 'origin/maint-libs-0.46' by 2 commits.
  (use "git push" to publish your local commits)

You are currently cherry-picking commit 52d0ebbd7c.
  (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:
	new file:   .changelog/unreleased/CI/4140-ledger-namada-unit-tests-ci.md
	new file:   .changelog/unreleased/SDK/4127-masp-for-namadillo.md
	new file:   .changelog/v1.0.0/miscellaneous/4123-apps-pre-release.md
	new file:   .changelog/v1.0.0/summary.md
	new file:   genesis/localnet/src/pre-genesis/established/established-account-tx-frank.toml

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both added:      .github/workflows/ci.yml
	both added:      .github/workflows/scripts/hermes.txt
	both added:      CHANGELOG.md
	both added:      Cargo.lock
	both added:      Cargo.toml
	both added:      README.md
	both added:      crates/apps/Cargo.toml
	both added:      crates/apps_lib/src/cli.rs
	both added:      crates/apps_lib/src/cli/client.rs
	both added:      crates/apps_lib/src/cli/context.rs
	both added:      crates/apps_lib/src/cli/wallet.rs
	both added:      crates/apps_lib/src/client/tx.rs
	both added:      crates/apps_lib/src/config/genesis/transactions.rs
	both added:      crates/apps_lib/src/config/genesis/utils.rs
	both added:      crates/apps_lib/src/wallet/defaults.rs
	both added:      crates/benches/native_vps.rs
	both added:      crates/core/src/masp.rs
	both added:      crates/ibc/src/lib.rs
	both added:      crates/node/src/bench_utils.rs
	both added:      crates/node/src/shell/testing/client.rs
	both added:      crates/sdk/src/args.rs
	both added:      crates/sdk/src/lib.rs
	both added:      crates/sdk/src/signing.rs
	both added:      crates/sdk/src/tx.rs
	both added:      crates/shielded_token/src/masp.rs
	both added:      crates/shielded_token/src/masp/shielded_wallet.rs
	both added:      crates/shielded_token/src/validation.rs
	both added:      crates/tests/src/e2e/helpers.rs
	both added:      crates/tests/src/e2e/ibc_tests.rs
	both added:      crates/tests/src/e2e/ledger_tests.rs
	both added:      crates/tests/src/e2e/setup.rs
	both added:      crates/tests/src/integration/helpers.rs
	both added:      crates/tests/src/integration/ledger_tests.rs
	both added:      crates/tests/src/integration/masp.rs
	both added:      crates/token/src/lib.rs
	both added:      crates/tx/src/types.rs
	both added:      crates/wallet/src/keys.rs
	both added:      crates/wallet/src/lib.rs
	both added:      crates/wallet/src/store.rs
	both added:      genesis/hardware/src/pre-genesis/wallet.toml
	both added:      genesis/localnet/balances.toml
	both added:      genesis/localnet/src/pre-genesis/signed-transactions.toml
	both added:      genesis/localnet/src/pre-genesis/unsigned-transactions.toml
	both added:      genesis/localnet/src/pre-genesis/wallet.toml
	both added:      genesis/localnet/transactions.toml
	both added:      wasm/Cargo.lock
	both added:      wasm_for_tests/Cargo.lock

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