Update Go dependencies and remove replace statements

[jauderho]

@HappyHacker123 recently pointed out an issue with the pinned dependencies while filing an issue with dnscontrol (StackExchange/dnscontrol#3112)

Upon further inspection, it appears that the replace statements were put in place 4 years ago. This PR updates the dependencies, removes the replace statements and bumps the Go version to 1.22 which is the current oldest supported Go version.

Changes:

• go: upgraded github.com/golang/protobuf v1.5.2 => v1.5.4
• go: upgraded golang.org/x/net v0.23.0 => v0.29.0
• go: upgraded golang.org/x/oauth2 v0.0.0-20220411215720-9780585627b5 => v0.23.0
• go: upgraded golang.org/x/time v0.0.0-20220922220347-f3bd1da661af => v0.6.0
• go: upgraded google.golang.org/appengine v1.6.7 => v1.6.8
• go: upgraded google.golang.org/protobuf v1.33.0 => v1.34.2

[jauderho]

Setting Go to 1.22 results in the following errors, so setting Go to 1.21 instead for now. go test -mod=vendor . now passes with no issue.

--- FAIL: TestRepository_ListTags (0.00s)
    registry_test.go:421: 
        	Error Trace:	/tmp/godo/registry_test.go:421
        	Error:      	Received unexpected error:
        	            	GET http://127.0.0.1:43432/v2/registry/test-registry/repositories/test%2Frepository/tags?page=1&per_page=1: 404 404 page not found
        	Test:       	TestRepository_ListTags
--- FAIL: TestRegistry_DeleteTag (0.00s)
    registry_test.go:449: 
        	Error Trace:	/tmp/godo/registry_test.go:449
        	Error:      	Received unexpected error:
        	            	DELETE http://127.0.0.1:40138/v2/registry/test-registry/repositories/test%2Frepository/tags/test-tag: 404 404 page not found
        	Test:       	TestRegistry_DeleteTag
--- FAIL: TestRegistry_ListManifests (0.00s)
    registry_test.go:519: 
        	Error Trace:	/tmp/godo/registry_test.go:519
        	Error:      	Received unexpected error:
        	            	GET http://127.0.0.1:35622/v2/registry/test-registry/repositories/test%2Frepository/digests?page=3&per_page=1: 404 404 page not found
        	Test:       	TestRegistry_ListManifests
--- FAIL: TestRegistry_DeleteManifest (0.00s)
    registry_test.go:549: 
        	Error Trace:	/tmp/godo/registry_test.go:549
        	Error:      	Received unexpected error:
        	            	DELETE http://127.0.0.1:40268/v2/registry/test-registry/repositories/test%2Frepository/digests/sha256:e692418e4cbaf90ca69d05a66403747baa33ee08806650b51fab815ad7fc331f: 404 404 page not found
        	Test:       	TestRegistry_DeleteManifest
FAIL
FAIL	github.com/digitalocean/godo	30.336s
FAIL

[andrewsomething]

👍 Thanks so much for the help cleaning this up!

[HappyHacker123]

Thanks for your efforts!