BUGFIX: Move access to objectAccess of TemplateObjectAccessInterface into getByPath

[dlubitz]

... as accessors are not used anymore for variable provider within fluid, starting v2.8.0.

Due to the missing accessors the objectAccess of TemplateObjectAccessInterface didn't get called anymore, so the result of the getByPath method was an object of FusionPathProxy instead of an rendered string.

See:
TYPO3/Fluid@2.7.4...2.8.0#diff-a0aa72aa19d9eb57cdb9a4dcd344c3706d75ae7ca408286f91a846e495b3c766L122
TYPO3/Fluid@2.7.4...2.8.0#diff-a0aa72aa19d9eb57cdb9a4dcd344c3706d75ae7ca408286f91a846e495b3c766L341
TYPO3/Fluid@2.7.4...2.8.0#diff-a0aa72aa19d9eb57cdb9a4dcd344c3706d75ae7ca408286f91a846e495b3c766L312

[kdambekalns]

Looks good, so fine if it works for you… 😇

[robertlemke]

Looks good, quickly tested this also with an application using Fluid.

[kdambekalns]

As I found out today, this does not work when you use {image.title} in Fluid and image is a FusionPathProxy:

1. StandardVariableProvider checks for ArrayAccess, FusionPathProxy provides that. offsetExists() and offsetGet() only check for the offset directly in the partial fusion tree – there we have no title
2. Now $subject is an object (our FusionPathProxy), but has no matching get/set/is/property
   3 Our TemplateVariableContainer is getting null back, and thus exits in https://github.com/neos/flow-development-collection/blob/9.0/Neos.FluidAdaptor/Classes/Core/ViewHelper/TemplateVariableContainer.php#L37 – that results in null again.
3. title ends up as null