deps: update dependency com.google.auth:google-auth-library-oauth2-http to v1.8.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.google.auth:google-auth-library-oauth2-http	1.4.0 -> 1.8.0

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Release Notes

googleapis/google-auth-library-java

v1.8.0

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Features

• add build scripts for native image testing in Java 17 (#​1440) (#​923) (bbb51ce)
• Adds Pluggable Auth support (WIF) (#​908) (c3e8d16)

Documentation

• updates README for Pluggable Auth (#​921) (23716b8)

v1.7.0

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Features

• Add ability to provide PrivateKey as Pkcs8 encoded string #​883 (#​889) (e0d6996)
• Add iam endpoint override to ImpersonatedCredentials (#​910) (97bfc4c)

Bug Fixes

• update branding in ExternalAccountCredentials (#​893) (0200dbb)

v1.6.0

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Features

• Add AWS Session Token to Metadata Requests (#​850) (577e9a5)

Bug Fixes

• ImmutableSet converted to List for Impersonated Credentials (#​732) (7dcd549)
• update library docs (#​868) (a081015)

1.5.3 (2022-02-24)

Bug Fixes

• ci: downgrade nexus-staging-maven-plugin to 1.6.8 (#​874) (fc331d4)

1.5.2 (2022-02-24)

Bug Fixes

• downgrading nexus staging plugin 1.6.8 (#​871) (e87224c)

1.5.1 (2022-02-22)

Bug Fixes

• deps: update dependency org.apache.maven.plugins:maven-javadoc-plugin to v3.3.2 (#​852) (aa557c7)

v1.5.3

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