fix(user): POST operation for `/users/{userID}/password` doesn't require basic auth

[bednar]

Related to https://influxcommunity.slack.com/archives/CHQ5VG6F8/p1662739448171649

The POST operation for /users/{userID}/password is used by InfluxDB clients (for more info see https://github.com/influxdata/influxdb-client-python/pull/498) and with current oss.yml we can't update the user's password.

This PR change the contracts according to current OSS implementation:

• Remove BasicAuth from POST operation for /users/{userID}/password
• Add PUT operation for /users/{userID}/password

For more info see:

• https://github.com/influxdata/influxdb/blob/b0a0e734e0c46384499cdc1f08f2673b6a28ff98/tenant/http_server_user.go#L91
• https://github.com/influxdata/influx-cli/blob/3a593e718476d9e671b4a003679722c0b32dc47b/clients/user/user.go#L148

[jstirnaman]

Adding @jeffreyssmith2nd and @lesam just to be sure, but it LGTM - we can improve the docs.

[bednar]

The PR is rebased

[lesam]

This looks like one for @jeffreyssmith2nd

[bednar]

@jstirnaman thanks for review. The description and examples are updated.

[bednar]

@jstirnaman thanks for your approval. I don't have a permission to merge this PR into master... Can you merge this PR? Thanks a lot