[cherrypick] Cherry-pick entropy changes from master to earlgrey_es#20935

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cfrantz wants to merge 5 commits intolowRISC:earlgrey_esfrom cfrantz:earlgrey_es

+2,170-608

Commits on Jan 23, 2024

[util] Cryptographically secure PRNG class

vrozic
authored and
cfrantz
committed
Integrate DRG3 class for generating randomness

vrozic
authored and
cfrantz
committed
Fix typos in secure_prng.py and secure_prng_test.py

vrozic
authored and
cfrantz
committed
[util] Remove traces of strong_random.py

vrozic
authored and
cfrantz
committed
[util] Remove strong_random.py and entropy_buffer_generator.py

vrozic
authored and
cfrantz
committed