Draft: Update OJ to 3.11.2, fix segfault from GC.compact

What does this MR do?

⚠ Don't merge.

Updates the oj gem version to include GC.compact-related fixes.

The target issue on the upstream: https://github.com/ohler55/oj/issues/637

oj CHANGELOG:

## 3.11.2 - 2021-01-27

- Fixed JSON gem `:decimal_class` option.

## 3.11.1 - 2021-01-24

- XrXr fixed Ruby 3.0.0 object movement issue.

## 3.11.0 - 2021-01-12

- Added `:compat_bigdecimal` to support the JSON gem `:decimal_class` undocumented option.

- Reverted the use of `:bigdecimal_load` for `:compat` mode.

## 3.10.18 - 2020-12-25

- Fix modes table by marking compat mode `:bigdecimal_load` instead of `:bigdecimal_as_decimal`.

- Added `:custom` mode setting that are the same as `:compat` mode. There are some minor differences between the two setting.

## 3.10.17 - 2020-12-15

- The undocumented JSON gem option of `:decimal_class` is now
  supported and the default option of `:bigdecimal_load` is also
  honored in JSON.parse() and in compat mode.

- Invalid encoding detection bug fixed for rails.

## 3.10.16 - 2020-11-10

- Allow escaping any character in :compat mode to match the json gem behavior.

## 3.10.15 - 2020-10-16

Remove license from code.

## 3.10.14 - 2020-09-05

- Updated float test to check a range.

## 3.10.13 - 2020-08-28

- Removed explicit dependency on bigdecimal.

## 3.10.12 - 2020-08-20

- Another try at bracketing bigdecimal versions to 1.0 and 3.

## 3.10.11 - 2020-08-20

- Bracketed bigdecimal dependency to 1.0 and 3.

## 3.10.10 - 2020-08-20

- Backed off bigdecimal dependency to 1.0.

## 3.10.9 - 2020-08-17

- Add bigdecimal dependency to gemfile.

## 3.10.8 - 2020-07-24

- New fast option for float parsing.

- Fixes a float parse error.

## 3.10.7 - 2020-07-13

- Faster float parsing and an adjust to more closely match Ruby.

Does this MR meet the acceptance criteria?

Conformity

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Availability and Testing

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Security

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Related to #323555 (closed)