[MAINTENANCE] fix sqlalchemy import

[joshua-stauffer]

Due to a recent change, convert_to_json_serializable errors if sqlalchemy is not installed.

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 66.66667% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 77.99%. Comparing base (3aaa855) to head (d0242b9).

Files	Patch %	Lines
great_expectations/core/util.py	66.66%	1 Missing :warning:

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #9872      +/-   ##
===========================================
- Coverage    77.99%   77.99%   -0.01%     
===========================================
  Files          495      495              
  Lines        42537    42539       +2     
===========================================
+ Hits         33176    33177       +1     
- Misses        9361     9362       +1     

Flag	Coverage Δ
3.10	64.21% <66.66%> (-0.01%)	:arrow_down:
3.10 athena or clickhouse or openpyxl or pyarrow or project or sqlite or aws_creds	?
3.10 aws_deps	?
3.10 big	?
3.10 databricks	?
3.10 filesystem	?
3.10 mssql	?
3.10 mysql	?
3.10 postgresql	?
3.10 snowflake	?
3.10 spark	?
3.10 trino	?
3.11	64.21% <66.66%> (-0.01%)	:arrow_down:
3.11 athena or clickhouse or openpyxl or pyarrow or project or sqlite or aws_creds	53.86% <66.66%> (-0.01%)	:arrow_down:
3.11 aws_deps	44.78% <66.66%> (+<0.01%)	:arrow_up:
3.11 big	55.74% <66.66%> (-0.01%)	:arrow_down:
3.11 databricks	45.96% <66.66%> (+<0.01%)	:arrow_up:
3.11 filesystem	61.16% <66.66%> (-0.01%)	:arrow_down:
3.11 mssql	48.77% <33.33%> (+<0.01%)	:arrow_up:
3.11 mysql	48.83% <66.66%> (+<0.01%)	:arrow_up:
3.11 postgresql	52.74% <66.66%> (-0.01%)	:arrow_down:
3.11 snowflake	46.57% <66.66%> (+<0.01%)	:arrow_up:
3.11 spark	57.16% <66.66%> (-0.01%)	:arrow_down:
3.11 trino	50.74% <66.66%> (-0.01%)	:arrow_down:
3.8	64.22% <66.66%> (-0.02%)	:arrow_down:
3.8 athena or clickhouse or openpyxl or pyarrow or project or sqlite or aws_creds	53.86% <66.66%> (-0.01%)	:arrow_down:
3.8 aws_deps	44.80% <66.66%> (+<0.01%)	:arrow_up:
3.8 big	55.75% <66.66%> (-0.01%)	:arrow_down:
3.8 databricks	45.97% <66.66%> (+<0.01%)	:arrow_up:
3.8 filesystem	61.18% <66.66%> (-0.01%)	:arrow_down:
3.8 mssql	48.75% <33.33%> (+<0.01%)	:arrow_up:
3.8 mysql	48.81% <66.66%> (+<0.01%)	:arrow_up:
3.8 postgresql	52.73% <66.66%> (-0.01%)	:arrow_down:
3.8 snowflake	46.58% <66.66%> (+<0.01%)	:arrow_up:
3.8 spark	57.13% <66.66%> (-0.01%)	:arrow_down:
3.8 trino	50.72% <66.66%> (-0.01%)	:arrow_down:
3.9	64.23% <66.66%> (-0.01%)	:arrow_down:
3.9 athena or clickhouse or openpyxl or pyarrow or project or sqlite or aws_creds	?
3.9 aws_deps	?
3.9 big	?
3.9 databricks	?
3.9 filesystem	?
3.9 mssql	?
3.9 mysql	?
3.9 postgresql	?
3.9 snowflake	?
3.9 spark	?
3.9 trino	?
cloud	0.00% <0.00%> (ø)
docs-basic	49.10% <66.66%> (+<0.01%)	:arrow_up:
docs-creds-needed	50.22% <66.66%> (-0.01%)	:arrow_down:
docs-spark	48.31% <66.66%> (+<0.01%)	:arrow_up:

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