Fix error when trying to call list_schemas macro for BigQuery adapter

[azhard]

resolves #2412

Description

Adds missing database parameter to adapter.list_schemas macro that is called by bigquery__list_schemas

Checklist

• I have signed the CLA
• I have run this code in development and it appears to resolve the stated issue
• This PR includes tests, or tests are not required/relevant for this PR
• I have updated the CHANGELOG.md and added information about my change to the "dbt next" section.

[cla-bot]

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[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: Azhar Dewji.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email email@example.com
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails

[beckjake]

@cla-bot check

[cla-bot]

The cla-bot has been summoned, and re-checked this pull request!

[beckjake]

Thanks for your contribution @azhard! I guess we don't call this as a macro very often.

Can you please add yourself as a contributor in CHANGELOG.md as well? I don't think the next release currently has one, so add a new contributors section like the ones in earlier releases and add yourself/this PR to it. That way we know to give you credit in the release notes.

[beckjake]

Thanks @azhard! I've kicked off tests and once they pass, we'll merge this.