Potential bug in keyhosting unit test

### TL;DR

See error log

```
-test.shuffle 1691087712673395865
{"severity":"INFO","timestamp":"2023-08-03T18:35:12.679477149Z","caller":"jvscrypto/rotation_handler.go:285","message":"primary does not exist, should promote the newest key to primary regardless of propagation delay.","version":"name:\"newEnabledKey\" state:ENABLED create_time:{seconds:8640000}"}
{"severity":"INFO","timestamp":"2023-08-03T18:35:12.68174308Z","caller":"jvscrypto/rotation_handler.go:250","message":"version created before cutoff date, should disable.","version":"name:\"oldEnabledKey\" state:ENABLED create_time:{seconds:4320000}","cutoff":"1970-04-01T00:00:00Z"}
{"severity":"INFO","timestamp":"2023-08-03T18:35:12.681923582Z","caller":"jvscrypto/rotation_handler.go:238","message":"version created before cutoff date, should destroy.","version":"name:\"oldDisabledKey\" state:DISABLED create_time:{seconds:86400}","cutoff":"1970-03-12T00:00:00Z"}
{"severity":"INFO","timestamp":"2023-08-03T18:35:12.682035484Z","caller":"jvscrypto/rotation_handler.go:2[27](https://github.com/abcxyz/jvs/actions/runs/5754435631/job/15599708244#step:5:28)","message":"no action needed for key version in current state.","version":"name:\"oldDestroyedKey\" state:DESTROYED create_time:{seconds:86400}","state":"DESTROYED"}
{"severity":"INFO","timestamp":"2023-08-03T18:35:12.683451203Z","caller":"jvscrypto/rotation_handler.go:[29](https://github.com/abcxyz/jvs/actions/runs/5754435631/job/15599708244#step:5:30)1","message":"version created before cutoff date, should promote to primary.","version":"name:\"newEnabledKey\" state:ENABLED create_time:{seconds:8553600}","cutoff":"1970-04-10T12:00:00Z"}
{"severity":"INFO","timestamp":"2023-08-03T18:35:12.684453717Z","caller":"jvscrypto/rotation_handler.go:250","message":"version created before cutoff date, should disable.","version":"name:\"oldEnabledKey2\" state:ENABLED create_time:{seconds:4233600}","cutoff":"1970-04-01T00:00:00Z"}
{"severity":"INFO","timestamp":"2023-08-03T18:35:12.684581519Z","caller":"jvscrypto/rotation_handler.go:291","message":"version created before cutoff date, should promote to primary.","version":"name:\"newEnabledKey\" state:ENABLED create_time:{seconds:8553600}","cutoff":"1970-04-10T12:00:00Z"}
{"severity":"INFO","timestamp":"2023-08-03T18:35:12.685985938Z","caller":"jvscrypto/rotation_handler.go:291","message":"version created before cutoff date, should promote to primary.","version":"name:\"newEnabledKey\" state:ENABLED create_time:{seconds:8553600}","cutoff":"1970-04-10T12:00:00Z"}
{"severity":"INFO","timestamp":"2023-08-03T18:35:12.687011952Z","caller":"jvscrypto/rotation_handler.go:269","message":"version created before cutoff date, should rotate.","version":"name:\"oldEnabledKey\" state:ENABLED create_time:{seconds:4[32](https://github.com/abcxyz/jvs/actions/runs/5754435631/job/15599708244#step:5:33)0000}","cutoff":"1970-04-01T01:00:00Z"}
{"severity":"INFO","timestamp":"2023-08-03T18:[35](https://github.com/abcxyz/jvs/actions/runs/5754435631/job/15599708244#step:5:36):12.687519559Z","caller":"jvscrypto/rotation_handler.go:250","message":"version created before cutoff date, should disable.","version":"name:\"oldEnabledKey\" state:ENABLED create_time:{seconds:4320000}","cutoff":"1970-04-01T00:00:00Z"}
{"severity":"INFO","timestamp":"2023-08-03T18:35:12.688444072Z","caller":"jvscrypto/rotation_handler.go:183","message":"no primary or new keys found, creating a new key and immediately promoting to primary."}
--- FAIL: TestGenerateJWKString (0.00s)
--- FAIL: TestGenerateJWKString/happy-path (0.01s)
key_hosting_test.go:1[40](https://github.com/abcxyz/jvs/actions/runs/5754435631/job/15599708244#step:5:41): Got diff (-want, +got): strings.Join({
`{"keys":[{"crv":"P-256","kid":"projects/[PROJECT]/locations/[LOC`,
"ATION]/keyRings/[KEY_RING]/cryptoKeys/[CRYPTO_KEY]/cryptoKeyVers",
`ions/[VERSION]-0","kty":"EC","x":"`,
- "wUu74eE1cWVRP3YNWmpXPSq7MjML3RSZWFGoRddzHA",
+ "AMFLu-HhNXFlUT92DVpqVz0quzIzC90UmVhRqEXXcxw",
`","y":"Pta0Tm_zRC580dHa3hTHRrU6gvSRGd0HCvO5qWI416c"}]}`,
}, "")
--- FAIL: TestGenerateJWKString/multi-key (0.01s)
key_hosting_test.go:140: Got diff (-want, +got): strings.Join({
`{"keys":[{"crv":"P-256","kid":"projects/[PROJECT]/locations/[LOC`,
"ATION]/keyRings/[KEY_RING]/cryptoKeys/[CRYPTO_KEY]/cryptoKeyVers",
`ions/[VERSION]-0","kty":"EC","x":"`,
- `wUu74eE1cWVRP3YNWmpXPSq7MjML3RSZWFGoRddzHA","y":"Pta0Tm_zRC580dH`,
- `a3hTHRrU6gvSRGd0HCvO5qWI[41](https://github.com/abcxyz/jvs/actions/runs/5754435631/job/15599708244#step:5:42)6c"},{"crv":"P-256","kid":"projects/[P`,
- "ROJECT]/locations/[LOCATION]/keyRings/[KEY_RING]/cryptoKeys/[CRY",
- `PTO_KEY]/cryptoKeyVersions/[VERSION]-1","kty":"EC","x":"wUu74eE1`,
- "cWVRP3YNWmpXPSq7MjML3RSZWFGoRddzHA",
+ `AMFLu-HhNXFlUT92DVpqVz0quzIzC90UmVhRqEXXcxw","y":"Pta0Tm_zRC580d`,
+ `Ha3hTHRrU6gvSRGd0HCvO5qWI416c"},{"crv":"P-256","kid":"projects/[`,
+ "PROJECT]/locations/[LOCATION]/keyRings/[KEY_RING]/cryptoKeys/[CR",
+ `YPTO_KEY]/cryptoKeyVersions/[VERSION]-1","kty":"EC","x":"AMFLu-H`,
+ "hNXFlUT92DVpqVz0quzIzC90UmVhRqEXXcxw",
`","y":"Pta0Tm_zRC580dHa3hTHRrU6gvSRGd0HCvO5qWI416c"}]}`,
}, "")
```

### Expected behavior

_No response_

### Observed behavior

_No response_

### Environment Details

```markdown
NA
```

### Additional information

_No response_