Deprecate toolchains and fix binary python types in .gitattributes

[codecov[bot]]

Codecov Report

Patch coverage has no change and project coverage change: -0.01 :warning:

Comparison is base (dddb9d6) 4.28% compared to head (66a8953) 4.28%.

:exclamation: Current head 66a8953 differs from pull request most recent head 70b2059. Consider uploading reports for the commit 70b2059 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #99 +/- ## ========================================= - Coverage 4.28% 4.28% -0.01% ========================================= Files 181 181 Lines 81533 81538 +5 ========================================= Hits 3490 3490 - Misses 78043 78048 +5 ``` | Flag | Coverage Δ | | |---|---|---| | Linux | `4.28% <0.00%> (-0.01%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=tianocore#carryforward-flags-in-the-pull-request-comment) to find out more. | [Impacted Files](https://app.codecov.io/gh/tianocore/edk2-basetools/pull/99?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=tianocore) | Coverage Δ | | |---|---|---| | [edk2basetools/build/build.py](https://app.codecov.io/gh/tianocore/edk2-basetools/pull/99?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=tianocore#diff-ZWRrMmJhc2V0b29scy9idWlsZC9idWlsZC5weQ==) | `0.00% <0.00%> (ø)` | |

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