[lazyinit] refactor lazy tensor and lazy init ctx

[ver217]

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Closes #3130

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Implement a single-process version of lazy initialization described in #3124 .

This code is tested locally, and as the model zoo is integrating, more tests will be added in the next PR.

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[github-actions]

The code coverage for the changed files is %.

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Name                                     Stmts   Miss  Cover
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colossalai/utils/model/experimental.py     204    204     0%
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TOTAL                                      204    204     0%

[github-actions]

The code coverage for the changed files is %.

Click me to view the complete report

Name                                     Stmts   Miss  Cover
------------------------------------------------------------
colossalai/utils/model/experimental.py     204    204     0%
------------------------------------------------------------
TOTAL                                      204    204     0%

[github-actions]

The code coverage for the changed files is %.

Click me to view the complete report

Name                                     Stmts   Miss  Cover
------------------------------------------------------------
colossalai/utils/model/experimental.py     204    204     0%
------------------------------------------------------------
TOTAL                                      204    204     0%