* chore(csql): use daemon threads internally

…2056)

test: Update the FakeSslServer and test harnesses for switchover tests.

This adds the ability to create a second server with different certifictates for use 
in a switchover test.

See also: GoogleCloudPlatform/cloud-sql-go-connector#844

This fixes the GraalVM distribution so that it can resolve DNS Names. GraalVM
needed the JDK's built-in DNS implementation to be explicitly configured, because
the DNS implementation classes are only referenced indirectly through reflection.

* chore: update mysql iam and postgres iam references


---------

Co-authored-by: Jack Wotherspoon <[email protected]>

…es. (#2125)

When the Cloud SQL Instance reports that it has a DNS Name, the connector will use standard TLS hostname 
validation when checking the server certificate. Now, the server's TLS certificate must contain a SAN record 
with the instance's DNS name.

The ConnectSettings API added a field dns_names which contains all of the valid DNS names for
an instance.

See also GoogleCloudPlatform/cloud-sql-go-connector#954

* deps: Update Non-major dependencies

* deps: Add explicit version for gson to resolve divergent versions in transient dependencies.

---------

Co-authored-by: Jonathan Hess <[email protected]>

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>