Improve glossary lookup performance by caching automaton

[nijel]

Describe the problem

On massive glossaries, glossary terms lookup can take hundredths of milliseconds.

Describe the solution you'd like

Use serialized automaton, this is currently discussed at G-Research/ahocorasick_rs#41.

Describe alternatives you've considered

No response

Screenshots

No response

Additional context

It used to be there since #5545, but it turned out not to be that good as the stored object was huge and restoring it from the cache took considerable time. It was reverted in dff3984. Since d8a62a4 the build times are much lower, but still, caching automaton would be probably beneficial.