Add us-la.

[jzohrab]

Replacement for https://github.com/covidatlas/coronadatascraper/pull/1032, a PR for CDS.

I'm calling this us-la, not just us-la-orleans-parish, b/c the data had "LA" data as well, so I assumed it was valid for the state.

Running this for today yields the following records:

scraping data from 2020-07-26
┌─────────┬─────────────────────────────────┬──────────────┬────────┬────────┬─────────┬─────────────┬──────────────────────┐
│ (index) │           locationID            │     date     │ cases  │ deaths │ tested  │ icu_current │ hospitalized_current │
├─────────┼─────────────────────────────────┼──────────────┼────────┼────────┼─────────┼─────────────┼──────────────────────┤
│    0    │ 'iso1:us#iso2:us-la#fips:22071' │ '2020-07-26' │  9898  │  552   │ 113465  │     348     │         1962         │
│    1    │      'iso1:us#iso2:us-la'       │ '2020-07-26' │ 107574 │  3651  │ 1233264 │             │                      │
└─────────┴─────────────────────────────────┴──────────────┴────────┴────────┴─────────┴─────────────┴──────────────────────┘
Scrape: us-la / 2020-07-26: 24.192ms

Those numbers look ok to me, the state numbers match approximately what google is returning in general.