fix(api,shared-data): Reference stable deck slot IDs instead of unstable enum names

[SyntaxColoring]

Overview

Labware definitions can adjust their gripper offsets depending on which slot they're in.

Currently, they specify this with names like SLOT_D3. But those names are internal and unstable. This PR switches them to be like D3, which is more stable, and exactly matches the keys in the deck definition.

Test Plan

• Confirm the offsets still apply.

Review requests

None in particular.

Risk assessment

Low.

[codecov]

Codecov Report

Merging #13499 (3510aaa) into chore_release-7.0.0 (017593d) will increase coverage by 0.00%.
The diff coverage is n/a.

Additional details and impacted files

@@                 Coverage Diff                  @@
##           chore_release-7.0.0   #13499   +/-   ##
====================================================
  Coverage                71.33%   71.33%           
====================================================
  Files                     2419     2418    -1     
  Lines                    67910    67908    -2     
  Branches                  7876     7876           
====================================================
  Hits                     48443    48443           
+ Misses                   17625    17623    -2     
  Partials                  1842     1842           

Flag	Coverage Δ
app	68.87% <ø> (+<0.01%)	⬆️
g-code-testing	96.44% <ø> (ø)
labware-library	49.17% <ø> (ø)
notify-server	89.13% <ø> (ø)
protocol-designer	46.09% <ø> (ø)
shared-data	73.88% <ø> (ø)
step-generation	87.18% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
api/src/opentrons/protocol_engine/state/labware.py	100.00% <ø> (ø)

... and 1 file with indirect coverage changes

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[sanni-t]

Glad you caught this! LGTM!