[Console] deprecated TableHelper in favor of Table
[Console] added the possibility to insert a table separator anywhere in a table output
[Console] make it possible to pass a style directly to Table::setStyle()
feature #10365 [Console] deprecated TableHelper in favor of Table (fabpot)

This PR was merged into the 2.5-dev branch.

Discussion
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[Console] deprecated TableHelper in favor of Table

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | yes
| Tests pass?   | yes
| Fixed tickets | #9788, #9680, #9325
| License       | MIT
| Doc PR        | symfony/symfony-docs#3627

This PR makes the Table helper stateless. It also adds a way to define global styles and to change/tweak existing styles easily.

The second commit adds the possibility to add a separator anywhere in the table output.

Commits
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21784ce [Console] make it possible to pass a style directly to Table::setStyle()
14caaec [Console] added the possibility to insert a table separator anywhere in a table output
39c495f [Console] deprecated TableHelper in favor of Table