GitHub library upgrades (#4200)

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Upgrade `github.com/google/go-github` from v80 to v84 and
`go-querystring` to resolve `ENG-3024`.

The upgrade involved updating import paths and `go.mod`/`go.sum`.
Although the upstream library had breaking changes between v80 and v84,
our specific usage of the GitHub client library was not affected, and
all existing tests pass.

---
Linear Issue:
[ENG-3024](https://linear.app/overmind/issue/ENG-3024/upgrade-github-libraries)

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GitOrigin-RevId: e4fb546b7842a3fbf86f17a6fbf8a653f1a867b7

Author: DavidS-ovm

go.mod

@@ -108,7 +108,7 @@ require (
 	github.com/go-jose/go-jose/v4 v4.1.3
 	github.com/gocarina/gocsv v0.0.0-20240520201108-78e41c74b4b1
 	github.com/google/btree v1.1.3
-	github.com/google/go-github/v80 v80.0.0
+	github.com/google/go-github/v84 v84.0.0
 	github.com/google/uuid v1.6.0
 	github.com/googleapis/gax-go/v2 v2.17.0
 	github.com/goombaio/namegenerator v0.0.0-20181006234301-989e774b106e
@@ -325,7 +325,7 @@ require (
 	github.com/google/go-cmp v0.7.0 // indirect
 	github.com/google/go-github/v30 v30.1.0 // indirect
 	github.com/google/go-github/v75 v75.0.0 // indirect
-	github.com/google/go-querystring v1.1.0 // indirect
+	github.com/google/go-querystring v1.2.0 // indirect
 	github.com/google/go-tpm v0.9.8 // indirect
 	github.com/google/jsonschema-go v0.4.2 // indirect
 	github.com/google/pprof v0.0.0-20260115054156-294ebfa9ad83 // indirect

go.sum

@@ -583,6 +583,7 @@ github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.8/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
 github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
 github.com/google/go-github/v30 v30.1.0 h1:VLDx+UolQICEOKu2m4uAoMti1SxuEBAl7RSEG16L+Oo=
@@ -591,11 +592,12 @@ github.com/google/go-github/v50 v50.1.0/go.mod h1:Ev4Tre8QoKiolvbpOSG3FIi4Mlon3S
 github.com/google/go-github/v50 v50.2.0/go.mod h1:VBY8FB6yPIjrtKhozXv4FQupxKLS6H4m6xFZlT43q8Q=
 github.com/google/go-github/v75 v75.0.0 h1:k7q8Bvg+W5KxRl9Tjq16a9XEgVY1pwuiG5sIL7435Ic=
 github.com/google/go-github/v75 v75.0.0/go.mod h1:H3LUJEA1TCrzuUqtdAQniBNwuKiQIqdGKgBo1/M/uqI=
-github.com/google/go-github/v80 v80.0.0 h1:BTyk3QOHekrk5VF+jIGz1TNEsmeoQG9K/UWaaP+EWQs=
-github.com/google/go-github/v80 v80.0.0/go.mod h1:pRo4AIMdHW83HNMGfNysgSAv0vmu+/pkY8nZO9FT9Yo=
+github.com/google/go-github/v84 v84.0.0 h1:I/0Xn5IuChMe8TdmI2bbim5nyhaRFJ7DEdzmD2w+yVA=
+github.com/google/go-github/v84 v84.0.0/go.mod h1:WwYL1z1ajRdlaPszjVu/47x1L0PXukJBn73xsiYrRRQ=
 github.com/google/go-querystring v1.0.0/go.mod h1:odCYkC5MyYFN7vkCjXpyrEuKhc/BUO6wN/zVPAxq5ck=
-github.com/google/go-querystring v1.1.0 h1:AnCroh3fv4ZBgVIf1Iwtovgjaw/GiKJo8M8yD/fhyJ8=
 github.com/google/go-querystring v1.1.0/go.mod h1:Kcdr2DB4koayq7X8pmAG4sNG59So17icRSOU623lUBU=
+github.com/google/go-querystring v1.2.0 h1:yhqkPbu2/OH+V9BfpCVPZkNmUXhb2gBxJArfhIxNtP0=
+github.com/google/go-querystring v1.2.0/go.mod h1:8IFJqpSRITyJ8QhQ13bmbeMBDfmeEJZD5A0egEOmkqU=
 github.com/google/go-tpm v0.9.8 h1:slArAR9Ft+1ybZu0lBwpSmpwhRXaa85hWtMinMyRAWo=
 github.com/google/go-tpm v0.9.8/go.mod h1:h9jEsEECg7gtLis0upRBQU+GhYVH6jMjrFxI8u6bVUY=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=