Fix agas addressing cache

[JiakunYan]

Fixes #6443

The get_entry method of lru_cache is not read-only. There is a touch method being invoked inside it.

[hkaiser]

LGTM, thanks!

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ -0.09%	✅ 100.00%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (bd9e3cb)	206733	176202	85.23%
Head commit (a21ee01)	190747 (-15986)	162397 (-13805)	85.14% (-0.09%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#6445)	1	1	100.00%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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