docs(lstk hotfix): update CLI reference to v0.22.1

[gtsiolis]

Brings the lstk CLI reference up to date with the v0.22.1 release. The docs were last synced at v0.19.0 (#830), so this catches up the full v0.20.0..v0.22.1 backlog.

Files in scope (no shared lstk components exist, so each page carries its own reference content):

• src/content/docs/aws/developer-tools/running-localstack/lstk.mdx
• src/content/docs/azure/developer-tools/lstk.mdx

The two pages are near-identical and received the same edits.

What changed

Corrected (stale):

• Auth-token precedence — LOCALSTACK_AUTH_TOKEN now takes precedence over a token stored in the keyring (reversed in lstk v0.21.0). The Authentication section and the environment-variable table previously stated the keyring wins.

Added (v0.20.0 → v0.22.1):

• Targeting an external emulator — new section for the global --endpoint-url flag and LSTK_ENDPOINT_URL env var (with AWS_ENDPOINT_URL as a lower-priority synonym): scheme preservation for https:// ephemeral instances, emulator-type auto-detection, and the lists of commands that accept vs. reject an endpoint. Added rows to the Global options and environment-variable tables.
• --account on lstk aws — new "Selecting the account" subsection and an options-table row (12-digit rule, AWS_ACCESS_KEY_ID fallback), noting terraform/sam share the flag and cdk rejects it.
• container_name and expose_ports config keys — added to the default config sample and the field-reference table, plus a new "Exposing extra ports" subsection.
• snapshot versions subcommand and version-pinned pod:<name>:<version> refs on load/show (with the note that save/remove/versions/s3:// reject a version suffix).
• Container-runtime discovery — documented DOCKER_CONTEXT and Rancher Desktop / Podman / Lima detection alongside the resolution order.
• lstk aws <TAB> completion note in the Shell completions section.

Review

Advisable.

• The auth-token precedence correction is a user-facing behavior change worth a glance to confirm it reads as intended.
• The new Targeting an external emulator and account-selection wording is drawn from the CLI's own help and source; a quick skim would be welcome.

Closes DOC-412

Cc @localstack/devx for visibility and any corrections.

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