[Core] source ~/.bashrc when tailing SkyServe logs

[cblmemo]

Similar to #3531, SkyServe logs experienced similar behaviour. This PR fixes it.

I 05-10 14:45:40 replica_managers.py:103] Replica cluster http-1 launched.
Start streaming logs for task job of replica 1...
I 05-10 14:46:00 cloud_vm_ray_backend.py:3660] Job ID not provided. Streaming the logs of the latest job.
kubectl port-forward failed. Error: E0510 14:46:00.754177    4721 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp [::1]:8080: connect: connection refused
E0510 14:46:00.754784    4721 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp [::1]:8080: connect: connection refused
E0510 14:46:00.756412    4721 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp [::1]:8080: connect: connection refused
E0510 14:46:00.756954    4721 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp [::1]:8080: connect: connection refused
The connection to the server localhost:8080 was refused - did you specify the right host or port?
kex_exchange_identification: Connection closed by remote host
Connection closed by UNKNOWN port 65535
kex_exchange_identification: Connection closed by remote host
Connection closed by UNKNOWN port 65535
Failed to stream logs for replica 1.

Tested (run the relevant ones):

• Code formatting: bash format.sh
• Any manual or new tests for this PR (please specify below)
• All smoke tests: pytest tests/test_smoke.py
• Relevant individual smoke tests: pytest tests/test_smoke.py::test_fill_in_the_name
• Backward compatibility tests: conda deactivate; bash -i tests/backward_compatibility_tests.sh