[CI] Upgrade sccache version to 0.7.*

[lhutton1]

Sccache was previously pinned at version 0.3.3, however, there has recently been an issue when installing some of its dependencies:

error[E0277]: expected a `Fn(reqwest::Request, &'a mut task_local_extensions::extensions::Extensions, reqwest_middleware::Next<'a>)` closure, found `RetryAfterMiddleware`

Upgrading the version of sccache to the latest seems to resolve this error.

In addition, the JFrog artifactory link for boost has been flaky recently, so changing to an alternative
mirror suggested in boostorg/boost#842.

[lhutton1]

@tvm-bot rerun

[yongwww]

The s3 authentication happens during the sccache --start_server for sccache 0.7.x, the ci build will fail with this upgrade,
test to produce the ci issue with images (sccache 0.7+):
docker/bash.sh --env CI --env PLATFORM --env TVM_SHARD_INDEX --env TVM_NUM_SHARDS --env RUN_DISPLAY_URL --env PLATFORM --env SKIP_SLOW_TESTS --env TEST_STEP_NAME --env NVIDIA_DISABLE_REQUIRE=true --env CI_NUM_EXECUTORS tlcpackstaging/ci_cpu:20240111-070205-0b2358c2e ./tests/scripts/task_build.py --sccache-bucket tvm-sccache-prod --build-dir build
Looks we will have to provide SCCACHE_BUCKET, SCCACHE_REGION, and aws credential AWS_PROFILE (or AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, and AWS_SESSION_TOKEN) based on the sccache s3 doc.