chore(deps): update terraform googlecloudplatform/lb-http/google to v12

This MR contains the following updates:

Package	Type	Update	Change
GoogleCloudPlatform/lb-http/google (source)	module	major	~> 9.0 -> ~> 12.0

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Release Notes

terraform-google-modules/terraform-google-lb-http (GoogleCloudPlatform/lb-http/google)

v12.0.0

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⚠ BREAKING CHANGES

• TPG >=6.0: added iap.enabled for v6 upgrade (#​453)

Features

• Add creating serverless negs inside module/serverless-negs itself (#​438) (ec0b73b)
• TPG >=6.0: added iap.enabled for v6 upgrade (#​453) (c8db02c)

v11.1.0

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Features

• Add support for setting http_keep_alive_timeout_sec (#​425) (804b7b9)

Bug Fixes

• add backend.groups.description variable to serverless_neg (#​427) (3d7943c)

v11.0.0

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⚠ BREAKING CHANGES

• TPG>=4.84: make health_check optional in root module for serverless neg (#​414)

Features

• TPG>=4.84: make health_check optional in root module for serverless neg (#​414) (fe92b95)

Bug Fixes

• updates for tflint (#​403) (29e4503)

v10.2.0

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Features

• Allow specifying HTTP and HTTPS port. (#​409) (e24a5a5)

v10.1.0

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Features

• Add Server TLS Policy parameter (#​387) (c553947)
• Added support for locality_lb_policy (#​392) (0127723)

v10.0.0

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⚠ BREAKING CHANGES

• Fix certificate map issue. Allow adding different types of certificates together. (#​382)

Features

• add bypass_cache_on_request_headers to cdn_policy (#​385) (e91961b)

Bug Fixes

• Fix certificate map issue. Allow adding different types of certificates together. (#​382) (d1c89b9)
• Invalid variable name in outlier_detection block (#​381) (34fbda9)

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Fixes #60 (closed)