[Catalog] Add TPU V6e.

[cblmemo]

This PR adds hardcoded TPU V6e price to our catalog. Currently, TPU V6e is not in GPC SKUs, so we use the pricing in GCP TPU Pricing first.

There are some missing zones in the pricing page and I set their price to 0.0 so user can launch on those regions.

The hardcode catalog is generated by this script:

zones = ['us-east5-b', 'us-east5-c', 'us-south1-a', 'europe-west4-a', 'us-central1-c', 'us-south1-c', 'us-central1-b', 'asia-northeast1-b', 'us-east1-d', 'us-central2-b']
acc_nums = [1, 4, 8, 16, 32, 64, 128, 256]
region2price = {
    'us-east1': 2.7,
    'us-east5': 2.7,
    'europe-west4': 2.97,
    'asia-northeast1': 3.24,
}

no_pricing_info_region = set()

for n in acc_nums:
    acc_name = f'tpu-v6e-{n}'
    for z in zones:
        r = '-'.join(z.split('-')[:-1])
        if r not in region2price:
            no_pricing_info_region.add(r)
            continue
        p = region2price[r] * n
        print(f' ,{acc_name},1,,,{acc_name},{p},,{r},{z}')

print(no_pricing_info_region)

Tested (run the relevant ones):

• [x] Code formatting: bash format.sh
• [x] Any manual or new tests for this PR (please specify below)
  • [x] python -m sky.clouds.service_catalog.data_fetchers.fetch_gcp --single-threaded --all-regions
• [ ] 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

[cblmemo]

All region catalog fetching passed. Merging now!