[NFC] - Replace deprecated function in AngularLoaderTest

[demeritcowboy]

Overview

Addresses test fail in #21064

Before

Deprecated function AngularLoader->load()

After

Technical Details

Deprecation not coming up in regular test runs because the @ was hiding it.

Comments

Is test.

[civibot]

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[seamuslee001]

This seems fine to me but maybe @colemanw wanted it like the other way to confirm backwards compatibility ?

[colemanw]

Looks good to me.

[demeritcowboy]

Thanks!