Resolved Bytes vtable

[aleksdmladenovic]

Description

I exposed the drop function of Bytes for resolving the memory fragmentation issues because Bytes are often very small (~50% of the data is less than 500 bytes). I invoked the drop function by using std::mem::drop().

#437

Type of change

• [x] New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• [x] Tests added/amended
• [x] bazel test //... passes locally
• [x] PR is contained in a single commit, using git amend see some docs

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For testing, I added one test script for evicting items when there is not enough space.

Script: cargo test --test memory_store_test insert_drop_test -- --nocapture

Output:

• Printed Evicting item when the items should be evicted because there is no enough space.
• Printed BytesWrapper dropped and the Bytes data when the Bytes are dropped.

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This change is 

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