add 7.3 in basic features (pingcap#14312)

* Add temp.md

* Delete temp.md

* add 7.3 columns

Signed-off-by: Ran <[email protected]>

* add 7.2 column

Signed-off-by: Ran <[email protected]>

* add show analyze status

* Update basic-features.md

* Update basic-features.md

* Update basic-features.md

Co-authored-by: Grace Cai <[email protected]>

* Update basic-features.md

* Update basic-features.md

Co-authored-by: Grace Cai <[email protected]>

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Signed-off-by: Ran <[email protected]>
Co-authored-by: Aolin <[email protected]>
Co-authored-by: Grace Cai <[email protected]>
Co-authored-by: joey-yez <[email protected]>